how to inject b12 Vitamin Injection Dosage for Adults: Guidelines Treating Severe Vitamin B12 Deficiency

Is the commonly cited 100 mg oral dose based on human research

May be fed directly from the dropper, added to drinking water or mixed with food

Well, normally this vitamin is absorbed in the gut and so a disruption to normal gut function will reduce the amount of vitamin B12 that's being absorbed by the intestines and that will lead to a depletion of the normal body stores, which will then result in a deficiency in this vitamin within the body as a whole

Some medications have also been shown to increase the risk of a deficiency

Blood work can help clarify vitamin levels or other possible causes of persistent fatigue

See the reconstitution guide above for the per-unit math